youtube/vitess — pull request #265 by guokeno0 (2014-12-19 20:08:40+00:00)
Title: Dynamic query rule support for vttablet

A few changes in this patch:

1. QueryRuleSources top level framework to manage dynamic query rule sources
- Pluggable machanism for new dynamic query rule implementations
- Complete decouple of query rule management and query service
2. File based and Zookeeper based dynamic custom rule support
3. Unit and site tests for dynamic query rule machanisms